Cleaning And Maintenance; Technical Specifications - Velleman LABPS23023 Bedienungsanleitung

 Use appropriate test leads to short the negative terminal of the master output with the positive binding post
of the slave output if the two adjustable outputs are connected in series. Failure to do this will cause the
current to run through the shorted switch, as the negative terminal of the master output is shorted by
switch [11]. This will affect the reliability of the device.
5.3 Parallel use of the two adjustable outputs
 Put both switch [11] and [12] in the ON-position. The two adjustable outputs are now connected in parallel.
Use control switch [21] to adjust the C.V. of the master output. The voltage of master and slave will remain
identical to each other and the C.C.-indicator [6] of the slave output will light.
 The C.C.-control switch [4] of the slave output does not work when the two adjustable outputs are
connected in parallel. Subsequently, the operator should use the C.C.-switch [20] of the master output
when one of the adjustable outputs is used as constant current supply. The output current of the master
and slave outputs are identical to each other and both are now controlled by [20].
 Use test leads to connect the two positive and negative terminals of the master and slave outputs when the
two adjustable outputs are connected in parallel. This is necessary to ensure a reliable connection between
the load and the two outputs connected in parallel. The current of the two outputs may not be identical if
the load is connected to only one output terminal. This may cause damage to series/parallel switches [11]
and [12].
 The digital display carries 3 digits. Use a more precise measuring instrument to calibrate the load if you
need a more accurate indication.
Note
The 5V-output has optimal protection thanks to the short-circuit protection and the current-limiting point, a
feature also present in the two adjustable outputs. The power loss in case of short circuit is limited thanks to
the protection circuit that controls the power loss of the transistors in the power supply. This feature keeps the
device from being damaged. Nevertheless, the short circuit should be repaired as soon as possible in order to
prevent wear and unnecessary power consumption.
6.

Cleaning and Maintenance

 Disconnect the device from the mains prior to maintenance activities.
 The power supply cables must not show any damage. Have a qualified technician maintain the device.
 Wipe the device regularly with a moist, lint-free cloth. Do not use alcohol or solvents.
 There are no user-serviceable parts, apart from the fuse. Contact your dealer for spare parts if necessary.
 Store the device in a dry, well-ventilated, dust-free room and keep it clean. Remove the power plug if the
device is to be stored for a prolonged period of time.
7.

Technical Specifications

input voltage 230 V
2x 0-30 V
output voltage
output current 2x 0-3 A adjustable max. + 1x 3 A fixed
ripple voltage </= 1 mV
dimensions 360 × 265 × 165 mm
weight 7.139 kg
fuse T4
Use this device with original accessories only. Velleman nv cannot be held responsible in the event
of damage or injury resulting from (incorrect) use of this device. For more info concerning this
product and the latest version of this manual, please visit our website www.velleman.eu. The
information in this manual is subject to change without prior notice.
© COPYRIGHT NOTICE
The copyright to this manual is owned by Velleman nv. All worldwide rights reserved. No part of this
manual may be copied, reproduced, translated or reduced to any electronic medium or otherwise without the
prior written consent of the copyright holder.
V. 03 – 07/01/2016
LABPS23023
50 Hz
adjustable max. + 5 VDC fixed
5 ©Velleman nv